Geography
Part A - Cloud Types describes. There are three basic types of cloud: cirrus, cumulus, and stratus. Match each of the following items to the type of cloud Drag the appropriate items into their respective bins. View Available Hint(s) Reset Help The cloud family found at the highest altitudes Are larger and have no distinct individual cloud units High, white, and thin Sheets or layers covering most or all of the sky Have a cauliflower appearance Have a feathery appearance Comprised of globular, individual cloud masses Cirrus Cumulus Stratus Submit Part B - Raindrop formation The maximum radius for cloud droplets is about 0.05 millimeters. However, typical raindrops have volumes thousands of times greater. Let's examine how these tiny cloud droplets turn into raindrops. Forming raindrops occurs within cumulus (cumulonimbus) and stratus (nimbostratus) clouds via the Bergeron process or the collision-coalescence process. The Bergeron process is active at subfreezing temperatures. Ice crystals grow from supercooled water droplets-tiny water droplets that are liquid below the freezing point of water. If a cloud is saturated with water, it is supersaturated with ice. Therefore, as ice crystals form, water droplets evaporate to replenish the water vapor used in forming ice crystals. These ice crystals can grow large enough to fall to the ground, melting to form raindrops as they reach higher temperatures during decent. For the collision-coalescence process: Larger water droplets collide and join with other water droplets, eventually forming raindrops that are large and heavy enough to fall to the ground. When these water droplets have more of an opportunity to collide with other water droplets (e.g., in taller clouds or because of updrafts), they are better able to form raindrops. Additionally, because the droplets are not all exactly the same size, they will move at different rates, increasing the likelihood of collisions. This rainfall can be measured using reflectivity. A higher rate of rainfall reflects more light than lower rainfall rate, so it is possible to determine the rate of rainfall using reflectivity. Select all that apply. View Available Hint(s) Rain forms via the collision-coalescence process when larger water droplets combine with other water droplets while passing through the cloud. Supercooled water in clouds enables the Bergeron process, where raindrops start as ice crystals. Thin sheets of clouds are conducive to raindrop formation via the collision-coalescence process. For temperatures below 0C, air that is saturated with water is not saturated with ice. Submit Now, you will use rainfall rates calculated from reflectivities to determine total rainfall. Part C - Calculating rainfall amounts People look at weather radar maps regularly to visualize current and recent weather patterns. These weather radar maps provides information on the intensity of precipitation in addition to the total amount of precipitation that falls over a given time period. The heavier the rainfall, the more reflective it is. This reflectivity can be used to calculate the rate of rainfall. The table provided below displays data that illustrates the relationship between radar reflectivity values and rainfall rates. Use this information to calculate the amount of rainfall for the radar values and rainfall durations provided. The calculations you will perform involve only simple algebra, like multiplication and addition. Drag the appropriate labels to their respective targets. Note that not all labels will be used. View Available Hint(s) Reset Help 12 inches 16 inches 0.6 inches 13.75 inches 3.25 inches 4.5 inches A reflectivity value of 47 dBZ for 2 hours. Conversion of radar reflectivity to rainfall rate Radar Rainfall Ratel Reflectivity (dBZ) (inches/hr) 65 16+ 60 8.0 55 4.0 52 2.5 A reflectivity value of 30 dBZ for 6 hours. A reflectivity value of 55 dBZ for 4 hours, A reflectivity value of 52 dBZ for 5 y hours. 47 1.3 A reflectivity value of 41 dBZ for 24 hours. 41 0.5 36 0.3 30 0.1 20 trace